You charge your off-hand weapon with lava, instantly dealing 718% Fire damage to an enemy target and spreading your Flame Shock from the target to up to 6 enemies within 12 yards.

Lava Lash is a shaman ability learned at level 10 for those with the enhancement specialization. It imbues the shaman's off-hand weapon with lava, dealing damage and spreading [Flame Shock] to up to four enemies within 12 yards.

0600Patch 6.0.2 (14-October-2014): Lava Lash’s damage done is no longer increased by Flametongue Weapon, and its damage has been increased to compensate.; Lava Lash now spreads Flame Shock to up to 6 nearby enemies (up from 4 enemies).; Lava Lash now has a cooldown of 10.5 seconds (up from 10 seconds).